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संबंधित प्रश्न
Define watt-hour. How many joules are equal to 1 watt-hour?
Calculate the cost of operating a heater of 500 W for 20 hours at the rate of Rs 3.90 per unit.
The commercial unit of energy is :
(a) watt
(b) watt-hour
(c) kilowatt-hour
(d) kilo-joule
State whether an electric heater will consume more electrical energy or less electrical energy per second when the length of its heating element is reduced. Give reasons for your answer.
Name the physical quality which is measured in
(i) Kw (ii) kWh
Mention three uses of the carbon arc.
How does the heat produced by die passage of current in a metallic wire depend on the current in the wire?
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate total current taken from the supply.
A 100-watt electric bulb is used for 5 hours daily and four 60 watt bulbs are used for 5 hours daily. Calculate the energy consumed (in kWh) in the month of January.
